A5071194999- Advanced Fiber Laser Technologies
- Solid State Laser Technologies
- Laser-Matter Interactions and Applications
- Photorefractive and Nonlinear Optics
- Nonlinear Optical Materials Studies
- Diamond and Carbon-based Materials Research
- Photonic and Optical Devices
- 2D Materials and Applications
- Plasmonic and Surface Plasmon Research
- Photonic Crystal and Fiber Optics
- Energy, Environment, Economic Growth
- Galaxies: Formation, Evolution, Phenomena
- Environmental Impact and Sustainability
- Complex Network Analysis Techniques
- Quantum Mechanics and Non-Hermitian Physics
- Graphene research and applications
- Astronomical Observations and Instrumentation
- Topological Materials and Phenomena
- Geophysics and Gravity Measurements
- Luminescence Properties of Advanced Materials
- Nonlinear Photonic Systems
- Optical Network Technologies
- Plant Disease Resistance and Genetics
- Geological and Geophysical Studies
- Neural Networks and Applications
National Astronomical Observatories
2023-2025
Chinese Academy of Sciences
2013-2025
Nanjing University
2016-2025
Collaborative Innovation Center of Advanced Microstructures
2017-2025
Fuzhou University
2024-2025
University of Chinese Academy of Sciences
2024
Guizhou University
2023-2024
State Key Laboratory of Cryptology
2024
Central China Normal University
2009-2023
University of California, Berkeley
2023
High-quality graphene sheets with lateral size over 20 μm have been obtained by bath sonicating after subjecting the wormlike graphite marginally to mixed oxidizer. To date, our knowledge, they are largest prepared exfoliation in liquid phase. A saturable absorber mirror was fabricated based on these sheets. We exploited it realize mode-locking operation a diode-pumped Nd:GdVO(4) laser. pulse duration of 16 ps produced an average power 360 mW and highest energy 8.4 nJ for mode-locked
Abstract As a quantum material, Weyl semimetal has series of electronic-band-structure features, including points with left and right chirality corresponding Berry curvature, which have been observed in experiments. These band-structure features also lead to some unique nonlinear properties, especially high-order harmonic generation (HHG) due the dynamic process electrons under strong laser excitation, remained unexplored previously. Herein, we obtain effective HHG type-II β-WP 2 crystals,...
Multifunctional electronic devices that combine logic operation and data storage functions are of great importance in developing next-generation computation. The recent development van der Waals (vdW) heterostructures based on various two-dimensional (2D) materials have brought exceptional opportunities designing novel devices. Although 2D-heterostructure-based been reported, multifunctional can operations still quite rare. In this work, we design fabricate a half-floating-gate field-effect...
Abstract Electronic processors are reaching the physical speed ceiling that heralds era of optical processors. Multifunctional all-optical logic gates (AOLGs) massively parallel processing great importance for large-scale integrated with far in excess electronics, while rather challenging due to limited operation bandwidth and multifunctional integration complexity. Here we first time experimentally demonstrate a reconfigurable all-in-one broadband AOLG achieves nine fundamental Boolean...
We demonstrated that the graphene could be used as an effective saturable absorber for Q-switched solid-state lasers. A mirror was fabricated with large and high-quality sheets deprived from liquid phase exfoliation. Using this mirror, 105-ns pulses 2.3-W average output power are obtained a passively Nd:GdVO(4) laser. The maximum pulse energy is 3.2 μJ. slope efficiency high 37% approximating to 40% of continue-wave laser, indicating low intrinsic loss graphene.
We demonstrate that few-layered graphene sheets used as a saturable absorber can provide efficient Q-switching and mode-locking modulation in 1.34 μm Nd:GdVO(4) bulk lasers. The minimum Q-switched pulses were 450 ns for 260 mW average power, 43 kHz repetition rate, 2.5 μJ pulse energy. For the mode-locked laser, an power of 1.29 W was achieved with 11 ps duration 13 nJ To our knowledge, this is highest yet obtained from corresponding optical-optical efficiency 23% best result among 1.3...
Abstract The 2D layered materials are promising candidates for broadband, low‐cost photodetectors. One deficiency of is the relatively low absorbance light, limiting applications Doping plasmonic nanoparticles into may enhance optical owing to localized surface resonance (LSPR) effect; however, considerable defects be introduced at same time, resulting in certain degradation device performance. Here, a novel design photodetectors with enhanced photoresponsivity by non‐contact (NPs) proposed,...
Bacterial blight ( BB ), caused by Xanthomonas oryzae pv. (Xoo), is one of the most devastating rice diseases worldwide. In this study, a introgression line IL FF 329, which was identified from BC 1 F 4 population derived cross between donor PSBRC 66 (P66) and recipient Huang‐Hua‐Zhan HHZ exhibited typical hypersensitive response HR ) when inoculated with all 21 representative Xoo strains, consisting 14 Philippines races seven Chinese pathotypes. By contrast, parents were highly susceptible...
We report passively Q-switched ∼2 and ∼3 μm mid-infrared (MIR) solid-state lasers with a self-assembly solvothermal-synthesized Bi2Te3/graphene heterostructure saturable absorber (SA) for the first time. Based on oxidation resistance high thermal conductivity of graphene, large modulation depth Bi2Te3 nanosheets, two high-performance Q-switching were realized. One is Tm:YAP laser maximum average output power 2.34 W pulse width 238 ns at μm. The corresponding peak was 91 W, which much...
Abstract Dirac-like topological insulators have attracted strong interest in optoelectronic application because of their unusual and startling properties. Here we report for the first time that pure insulator Bi 2 Te 3 exhibited a naturally ultrasensitive nonlinear absorption response to photoexcitation. The sheets with lateral size up few micrometers showed extremely low saturation intensities only 1.1 W/cm at 1.0 1.3 μm, respectively. Benefiting from this sensitive response, Q-switching...
In this paper, we reported a multiwavelength passively Q-switched Yb3+:GdAl3(BO3)4 solid-state laser with topological insulator Bi2Te3 as saturable absorber (SA) for the first time, to best of our knowledge. nanosheets were prepared by facile solvothermal method. The influence three densities on operation was compared. maximum average output power up 57 mW pulse energy 511.7 nJ. shortest pulsewidth measured be 370 ns 110 kHz repetition rate and 40 mW power. operated at wavelengths...
Abstract Rice false smut caused by Ustilaginoidea virens is an important constraint affecting rice yield and quality in Asia. In China, especially severe the japonica rice‐growing areas North China. Nothing known neither about diversity of pathogen this region nor characteristic its local population. study, 110 U. isolates sampled from Liaoning Beijing China were analysed using amplified fragment length polymorphism (AFLP) markers to primarily understand genetic population characteristics....
Using large-area graphene sheets of 1-10 layers prepared by the improved liquid phase exfoliation technique, mode locking operation a diode-pumped Yb:KGW laser was demonstrated. Near-transform-limited 428 fs pulses were yielded at 1031.1 nm with an output power 504 mW, corresponding to slope efficiency 27% and peak 13.8 kW. The ratio free running as high 93% 100%, respectively. This demonstration may open proper way achieve low-cost efficient femtosecond bulk laser.
False smut, caused by U stilaginoidea virens , is a rice disease of increasing importance worldwide, with no source high‐level resistance in the existing germplasm. To facilitate breeding varieties good levels field to false quantitative loci ( QRL ) were identified using 213 introgression lines IL s) from cross between T eqing (recipient) and L emont (donor) evaluated natural infection at two hotspots smut northeast C hina. Ten affecting percentages diseased hills, panicles spikelets...
WTe2 is a unique material in the family of transition metal dichalcogenides and it has been proposed as candidate for type-II Weyl semimetals. However, thus far, studies on optical properties this emerging have significantly hindered by lack large-area, high-quality materials. Here, we grow centimeter-scale, highly crystalline ultrathin film (∼35 nm) pulsed laser deposition technique. Broadband pump-probe spectroscopy (1.2–2.5 μm) reveals peculiar ultrafast response where an initial...
The use of Yb(3+) co-doping for the enhancement Ho(3+):(5)I(6)→(5)I(7) mid-IR (MIR) emissions was investigated in GGG crystal first time. It is established that highly increases Ho(3+) 2.84 μm by transforming pump energy from Yb(3+):(2)F(5/2) level to laser upper (5)I(6) Ho(3+). energy-transfer efficiency Ho(3+):(5)I(6) calculated be 96.2%. absorption cross section, emission and fluorescence quantum are estimated discussed. concluded Yb, Ho:GGG promising material an LD-pumped application.
Platinum diselenide (PtSe2), a type-II Dirac semi-metal material, is potential saturable absorber (SA) to generate visible pulsed lasers due its prominent optoelectronic properties. A high quality PtSe2 thin film was fabricated by combining magnetron sputtering with chemical vapor deposition methods; then, microtopography characterized atomic force microscopy. The absorption properties and electron relaxation time in the region were measured via open-aperture Z-scan femtosecond pump probe...
A 785 nm diode-pumped nanosecond passively Q-switched (PQS) 2.3 µm Tm:YLF laser using a ReSe2-based saturable output coupler (SOC) was reported for the first time. The SOC combined function of passive Q-switch and coupler, greatly reducing additional insertion loss compared with conventional separate structure. modulation depth, saturation intensity, nonsaturable this were determined to be 1.3%, 1.7 GW/cm2, 0.2%, respectively. maximum average power 486 mw, shortest pulse width 716 ns,...
<title>Abstract</title> Galaxy filaments, as quasi-linear and extensive features of galaxy distributions, are a crucial component the cosmic web. Cosmological simulations have predicted hierarchical nature to filaments. However, direct view small-scale filaments has been lacking validate this prediction. Here we report detection sub-galaxy-filament in Ursa Major cluster using atomic-hydrogen observations. This filament consists cold gas clumps various types galaxies, spanning length...
Broadband photodetection, especially for the high-intensity pulsed lasers, has garnered increasing interest in photophysics and applied sciences driven by development of lasers. However, direct broadband photodetection with precisely capturing their spatiotemporal properties, been hampered low saturation intensity or damage threshold traditional optoelectronic materials. Here, we demonstrate that strategic enhancement excitonic effects two-dimensional (2D) layered hybrid perovskite can...
Due to the ultralow saturation properties of topological insulator (TI), stable and high-power TI-based solid state has become an important issue. In this paper, using a folding V-shaped laser cavity minimize residual pump broadband saturable absorber, passive Q-switched operations with high power not only at 1.06 μm but 1.34 as well were demonstrated. The 1.06-μm 150 mW corresponding repetition rate pulse duration 28.57 kHz 576 ns, respectively, performed. energy 5.24 μJ peak over 9 W also...